H ine for molding plumberss rounded go-rn er-slabs



(No Model.) 3 Sheets-Sheet 1.

,W. H. EVANS. MACHINE FOR MOLDING PLUMBERS ROUNDED CORNER SLABS. No. 463,144. Patented Nov. 1731891;

18; NORRIS m-rrsiaspa, \VASHINGTON, a. c

(NoModeL) v W. H. EVANS. MACHINE FOR MOLDING PLUMBERS ROUNDED CORNER SLABS.

No. 463,144. Patented Nov. 17,1891.

a l up I :1

HI HSIK E; E lm ,y. El 4 w. l i J f; 7 H

7" 7 T m m /7Z4 L 0 E! a 0/ (No Model.) 4 3 Sheets-Sheet 3.

W. 1-1. EVANS.

MACHINE FOR MOLDING PLUMBERS ROUNDED CORNER SLABS." No. 463,144. Patented Nov. 17,1891.

' I 1' l I I I H wimwssz's I zwzwimfe rP-a NOR-RES PETERS C0,, wAsHmcmu. c.

Unrated 'rarns Parent rrrhn.

\VILLIAM I'l. EVANS, OF BALTIMORE, MARYLAND.

MACHINE FDR MQLDiNG PLUMBERS R UUNDED C-RNER'-SLABS.

SPECIFICATION forming part of Letters Patent No. 4168144, dated November 17,1891. Application filed June 80, 1891. $erlal No. 397,999i (N0 model.)

To aZZ whom it may concern.-

1 Be it known that I, WILLIAM H. EVANS, a citizen of the United States, residing at Bal timore, in the State of Maryland, have invented a certain new and useful Improvement.

inhlachines for llloldingPlumbers? Rounded Corner-Slabs, of which the'following isa full, clear, and exact description.

The object of this invention is to provide a machinei'or molding the edges of those stone slabs which are used especially for the tops or those stationary wash-stands which are set in. the angles of rooms, and more particu larly for molding slabs which have two straight sides at right angles and two other straight sides of inferior length andhaving their angle cut away and the intermediate portion curved,

resembling thus in a general way a quadrant.

It is this edge composed of the combined straight and curved lines that it is specifically the design of my invention to mold.

My invention comprises in one machine means for molding-that is to say, for cutting a molding upon both the straight and curved edges of the slab.

' I will proceed now to describe the principleof my invention and the best mode in which I have contemplated applying that principle and will then particularly point out and dis tinctly claim the part, combination, or iniprovement which I claim as my invention.

In the accompanying drawings, illustrating my invention, in the several figures of which like parts are similarly designated, Figure 1 is a side elevation. Fig. 2 is a plan view of a molded slab, the product of my machine. Fig. 3 is a front elevation. Fig. 4 is a plan of the table and carriages, and Fig. 5'is an elevation of the clamp for holding the slab upon the table. A I have shown my invention applied to a common form of marble molding and countersinking machine, of which a designates the foundation timbers or pieces; I), the bedc, the frame or neck; 01-, the head; e, the sliding bracket; f, the main shaft; g, the driving-pulleys on said shaft; and h is the cutter-shaft, carrying a suitable 'cuttenhead i. The cutter-shaftis fixed against longitudinal move ment in the bracket- 6 and hasa key or spline h to "'eceive the bevel-gear 7L2, which meshes with bevel-gear f on the driving-shaft f.

The cutter-shaft has longitudinal movement through a supportin the head (1. The bracket 6 is arranged upon rails c on the neck cand is moved up and down thereon by the screw j and hand-wheel j, and carries with it the cutter-shaft and cutter-head, as usual, to e1iable the work or stock to be put in place, the cutter-head properly applied, and the cutterhead and thereafter the work to be removed. The bed i) also is supplied with the carriage it, which is traversed longitudinally thereof by the screw 7t, and this carriage has ways 79, upon which is mounted the carriage Z, which is supplied with the screw Z, by which it may be moved longitudinally of the carriage 7t and transversely of the bed. These two carriages and their traversing mechanism are here shown as of usual construction. I may apply my-invention to machines of this character already in use, or I may build such amachine especially for the purposes of my invention. Moreoveza either or both ofthe carriages 7c and Z may be used; but I prefer to use both.

Now my invention is designed more espea segment of its edge is provided with Wormteeth m but this se mental Wormear ma be attached to instead-of made in the substance of the table. it, is a worm meshing with the segmental worm-gear and carried by a shaft n.- This shaft is supported in brackets 0,-which are made fast to the carriage Z. A parallel shaft 01 is supported in brackets 0, which also are made fast to the carriage Z. Shaft 41 is provided with a crank t and the two shafts are connected in operation by the cog-wheels n a v The carriage Z is provided with the upright stop-pins p p, on opposite sides and about a quarter-circle distant, and the table is provided with the fixed stops 1) 19, arranged at a greater distance-apart and designed to cooperate with the 'stop-pins to arrest the rotation of the table upon its completing a quarter of a revolution;

too

. slab on the table.

ments -against which the two straight sides 2 301: the slab 4 rest and serve to center the The slab isheld down upon the table by anysuitable means; I have shown in Fig.5 a suitable clamp forthis purpose, which is composed of bolts 3, arranged in holes si, in

the table and connected with and supporting a cross-bar t, which carries two or more headed and adjustable clamp-screws t, which may be I raised and lowered upon the work by rotation in the cross-bar 2. The clamp is arranged ob-, liquely-upon the table,-as indicated by the dotted line v The operation is as follows: The slab, hav- 'ing been first'savved 'or' otherwise given the outline shown iii-Fi 2 is-laid and clam ed as 1 P upon the table m, asindicated by dotted lines in Fig'. 4, with its angle in line with the diameter of the table and with the center of the circle in which the rounded portion of the slab is cutcoinoident with the axis of rotation of the table. a The cutter-head is arranged opposite point 5 and is set inmotion, and the carriage Z is moved toward the-right, while the carriage 7c is stationary. and the table is not rotated. When the carriage'lhas moved to the end of the straight line G of the slab next the curve 7 then the carriagel isstopped and thewornngearing set in motion and the table rotated, whereby the curved portion 7 of, the slab is presented to the rotating cutterhead and that portion-molded. \Vhen the straight portion 8 is reached, the rotation of the table is stopped and the carriage Z is again I moved toward the right in order to mold that portion of the slab. Obviously the 'movement oft-he slab in straightlines may be accomplishedby either of the carriages if the slab be arranged accordingly. In this way these rounded slabs may be molded very e .peditiously, and so far as I am aware I'arn the first to organize an attachment for a machine by which such work is done successively and at practically one operation.

Now while my machine has been designed more especially for molding slabs of the character'described, still it is obvious that it may be used for molding slabs that are true quadrants, and. in this case-the carriages will be moved only to bring the slab into position, and then the table will be revolved a quarter-turn to present the slab properly to the cutter. I i

mean, therefore, to include this use of my machine within my claims for the machine.

' WVhat I claim is i -1. An attachment for. stone-molding machines, consisting of a table adapted to he revolubly attached to the traveling carriage of such machines and in proper relation to the cutting-tool, two series of slots in said table arranged at right angles to each other and on chords of the circle of the table, knees adj ustably secured in said slots, a worm-toothed segment on said table, aworm to engage such segment, and a clamping'device secured to and'moving-with the table, substantially as described. i v j A i 2. An attachment for stone-molding Inachines, consisting of a table adaptedto be revolubly attached to the traveling carriage of snch'machines and in proper relation to the cutting-tool, two series of slots in said table arranged at right angles to each other and on chords of the circle of the table, knees adjustably secured in said slots, a clamping de-' vice secured to said table, a worm-toothed segment on said table, a worm to engagesnch segment, and stopping and fixed stops to limit the rotation of said table, substantially as described.

In testimony whereof I'h-ave hereunto set] my hand this 17th day of June, A. D. 1-891, g

Y, \VILLIAM H. EVANS.

Witnesses:

PH. II. HOFFMAN, LA, 0. TUCKER.

It; is hereby ceftified mun Lighters Patent N01 468,144, granted November 17, 1891, upon the apblicationf William'H; Evans of Baltimore, Marylandffon an improve= mailt in Machins for Molding Plumbers Rounded Comer-8135s,? an error appears in the primfsed specification requiring correction, a, followsi In lifieSQ, page 2 the word u vghould read stoppin and that the Letters Patent should b read with this cnrrecfibn thrin that the same mayco lfibr mio' the recordof the casein the Patnt Office.

Signd, coul itersignedfand sealed this 241311 daybf November, 1891.

CYRUS BUSSEY, Asismnt Seqremry of the Interior.

' [SEAL] Oountarsigned W. E. SIMONDS,

Conwnissioner of Patents: 

